I have been playing 716 AP2 since introduction and love them! They have Aerotech Steelfiber 110 upgrade shafts which I paid dearly for.....as my lower irons(i.e. 7-PW) have significant face wear, I was wondering if it will be possible to ship these back, and have new heads put on the old shafts, as the old shafts are expensive and like new?